Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — iodine food sources

Most people associate iodine exclusively with thyroid health — but this essential mineral plays a far broader role in the body. From breast tissue and ovarian function to fetal brain development and endometrial health, iodine is active in virtually every organ system. Deficiency is more widespread than commonly recognised, and standard thyroid blood tests cannot reliably detect it. This guide explores the extrathyroidal roles of iodine, the difference between iodide and molecular iodine, the controversy around dosing, and why testing urinary iodine is the most accurate way to assess your status.

By Tracy Tranchitella Reading and testing limitations: This article includes historical treatment accounts, older population estimates and proposed links with cancer and other conditions. These are not recommendations to use iodine to treat or prevent those conditions. Population urinary iodine thresholds are not individual diagnostic cut-offs. A urine result alone cannot establish tissue iodine stores, explain symptoms or determine a safe supplement dose. Excess iodine can disrupt thyroid function; discuss supplementation with a qualified healthcare professional, especially during pregnancy or with thyroid disease. The use of iodine dates back to 4th century China where seaweed and burnt sea sponge were...